New engine overhaul enables Stena Spey to maintain busy operational schedule

Marine engineering and propulsion specialist Royston has completed the overhaul of diesel generators onboard the Stena Spey semi-submersible mobile offshore drilling unit.

The work, part of an ongoing diesel engine maintenance and service program for vessels owned by international drilling contractor Stena Drilling, saw cylinder heads, pistons and connecting rods overhauled as part of Extensive 12,000 hour service run of a Rolls Royce Bergen KVGB12 Diesel Generators by Royston engineers on board the ship while in Orkney.

Reflecting Royston’s continued success in the offshore marine services sector despite current challenges, the work follows the previous overhaul of diesel power units on board other Stena vessels, including the ‘Stena Don’ platform. , and the 58,000 GWT “Stena IceMAX” and “Stena Carron Drillships.

The engines were stripped down to allow engineers to carry out maintenance and repair work on the 12 cylinder heads, two unit inspections, main bearing inspection, camshaft inspection, chain inspection distribution and training. Other work, which included repairs to water leaks in the No. 3 generator, involved removing the cylinder head, piston and connecting rod and renewing the cylinder liner.

After the service, successful trials were carried out to verify the performance of both engines and the repair work was in accordance with the manufacturer’s specifications.

Gordon Paton, Chief Engineer at Stena, said: “We are delighted to continue our relationship with Royston. Their familiarity with the engine type and this particular model meant that all work was carried out efficiently and quickly, allowing the vessel to resume operations quickly and on schedule.

Shaun Cairns, Royston’s Director of Operations, added: “Stena and other vessel operators can realize significant cost savings by using service providers like Royston without compromising the quality and standard of engineering work provided. We look forward to continuing to strengthen our relationship with them in the future as we successfully complete other projects.

Part of a six-person Stena Drilling fleet, the ‘Stena Spey’ is a semi-submersible drill, completion and workover vessel capable of undertaking drilling operations at depths of over 8,000m in the toughest environments.

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